#define SIG_BLOCK 0
#define SIG_SETMASK 2
#define UCONTEXT_FLAGS 0
#define UCONTEXT_LINK 4
#define UCONTEXT_STACK 8
#define UCONTEXT_MCONTEXT 20
#define UCONTEXT_SIGMASK 104
#define UCONTEXT_REGSPACE 232
#define MCONTEXT_TRAP_NO 20
#define MCONTEXT_ERROR_CODE 24
#define MCONTEXT_OLDMASK 28
#define MCONTEXT_ARM_R0 32
#define MCONTEXT_ARM_R4 48
#define MCONTEXT_ARM_SP 84
#define MCONTEXT_ARM_LR 88
#define MCONTEXT_ARM_PC 92
#define MCONTEXT_ARM_CPSR 96
#define MCONTEXT_FAULT_ADDRESS 100
